“To-day we have had a public Declamation, and in the preparation my chief difficulty was to determine how many lads should be allowed to make selections from your speech. I send you a programme, from which you will see that there is a good sprinkling of the true spirit. To you, intrusted with the momentous interests of our whole country, not to say those of the world, these boyish affairs may seem trifling.” Dr. Joseph Sargent, the eminent surgeon, of Worcester, wrote:-- “You have not said one word that we would have unsaid; and when you shall have opportunity again to speak those words of truth which are words of fire, we only wish to be at hand to take the blows ourselves, while you shall have the glory of having aroused a nation as it has not been aroused before, since the days which preceded the Revolution. Shame on the country which needed such a wrong to move it to the right!” Mrs. Lydia Maria Child wrote thus:-- “My chief motive in writing is to thank you for your magnificent speech, which met the requirements of the time with so much intellectual strength and moral heroism. Some ‘patriots’ called it ‘Un-American.’ It recalled to my mind the words of Aristophanes:-- “‘Sparta shall find An _honest_ chronicler, though Fear may try The prize with Truth. Yes, I have fears, and those In no small brood. I know the people well, Their temper’s edge and humor. Does some tongue Link cunning commendation with their own And country’s name? Their joy o’erflows the measure; It matters not the praise be wrong, nor that Their freedom pays the tickling of their ears.’ “Your political adversaries made such an outcry about your imprudent severity and unjustifiable personalities, that I cautiously examined whether there was any ground for such an allegation. Few persons have stronger aversion to harsh epithets and personal vituperation than I have, but I confess I could find nothing in your Kansas Speech which offended either my taste or my judgment. You rebuked States and individuals merely as the representatives of that ever-encroaching Slave Power, whose characteristic artifice, arrogance, and despotism it was necessary for you to portray in connection with the subject under debate.” These testimonies, which reveal the feelings of the time, might be multiplied indefinitely. The “sequel,” to which Mr. Clay refers, and to which allusion is made by other correspondents, will be found at the end of the speech in an Appendix. SPEECH.